Research/Sitter/MAGNDATA / 1.357_Ho3Ge4.mcif

Ho₃Ge₄

MAGNDATA entry 1.357 · source

noncollinear antiferromagnet

All moments add up to a net magnetisation: an ordinary magnet. Spin splitting is the same in every direction (s-wave).

ordered ≤ 6.6 K (−267 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_c 2₁/c BNS 14.82
Point group	2/m1′
Parent space group	C m c m No. 63
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[0 1 0] 1k
Cell	a 4.0055 · b 10.543 · c 14.105 Å · α 90° · β 90° · γ 90°
Transition	6.6 K (−267 °C)
Measured at	1.4 K
Magnetic ions	Ho
Largest moment component	8.9 μ_B
Method	NPD

Symmetry

Stereogram of the magnetic point group: each operation applied to one direction. Filled = upper hemisphere, ring = lower; red operations include time reversal. Lines are mirrors; polygons are 2/3/4/6-fold axes; the centre ring is inversion.

Every structure in P_c 2₁/c →

Atom sites · 5 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ho1	Ho	0.3323	0.097	0	0	−8.9	8.9
Ho2	Ho	0.044	0.25	7.2	0	0	7.2
Ge1	Ge	0.381	0.889
Ge2	Ge	0.771	0.25
Ge3	Ge	0	0

Moment components are along the crystal axes a, b, c (μ_B), as magCIF writes them. Symmetry generates the rest of the cell from these sites.

Source

O. Zaharko et al. J. Phys.: Condens. Matter (1998) · doi:10.1088/0953-8984/10/29/015

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.357_Ho3Ge4.mcif from MAGNDATA · entry page

sha256 of this copy: 8eab4331d76f5d1a99d81d156c84811abcdd775ff8c0afce95b28b64eeea2ac5
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.357_Ho3Ge4.mcif.